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Himax Technologies, Inc. (the Parent Company only) - Condensed Statements of Profit or Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Himax Technologies, Inc. (the Parent Company only)      
Revenues $ 832,173 $ 906,802 $ 945,428
Costs and expenses 788,047 838,581 902,216
Operating income 44,126 68,221 43,212
Interest income 9,842 9,907 8,746
Changes in fair value of financial assets at fair value through profit or loss 1,472 1,363 1,655
Foreign currency exchange gains (losses), net 2,801 2,491 (768)
Finance costs (3,491) (4,014) (6,080)
Loss on re-measurement of the pre-existing relationships in a business combination 0 0 (1,932)
Profit before income taxes 54,867 77,335 44,393
Income tax expense 9,592 (2,435) (5,028)
Profit for the year 45,275 79,770 49,421
Equity attributable to owners of parent      
Himax Technologies, Inc. (the Parent Company only)      
Revenues   0 0
Costs and expenses 562 618 547
Operating income (562) (618) (547)
Interest income 462 543 268
Changes in fair value of financial assets at fair value through profit or loss 1,063 1,238 1,639
Foreign currency exchange gains (losses), net 15 (166) (102)
Finance costs (3,301) (11,201) (12,371)
Loss on re-measurement of the pre-existing relationships in a business combination 0 0 (1,932)
Share of profits of subsidiaries and affiliates 46,260 89,959 63,661
Profit before income taxes 43,937 79,755 50,616
Income tax expense   0 0
Profit for the year $ 43,937 $ 79,755 $ 50,616